High quality spiral experience know-how learning site like khan academy about development? (in English)

Question

I feel, that part of the question got lost in translation, so here is my longer description of my programming related question:

Name one or many (website or blog or vlog or wiki or tweet account or database or ebook or forum or entity of stack exchange or feed or message board) that fill criterion's and at least 1 aspect as described below?

From 5 aspects described below, I want the 1-st one the most:

1. watch short 3-20 min (possibly HD) videos, about narrow programming related topic
2. read well written examples / test examples
3. practice / solve well formed problems
4. watch quality lectures 20-90+ min (possibly HD) videos
5. possibly written in many languages (in English)

Main criterion's are:

• more then 50 articles/videos
• ability to simply find next unseen closely related article, and keep doing that
• language at least 1 of: java, C#, python, mathematica, javascript, c, prototype, but could also be c++, php, sql, ruby, fortran, actionscript or any other .net language
• is free (meaning no subscription needed, or very low cost)
• categorized or tag based articles would be a great plus

In my effort, here is sites I have found, that fill the criterion's, and at lest 1 aspect:

• Codeproject.com (2)
• Project Euler (3; 5?)
• Youtube Edu > Engineering (1?; 4)
• Rosettacode (2; 5)
• Lynda (1, 2?, 3, 4)
• Open Courseware (1?; 2; 3; 4; 5?)

_{If you can, feel free to correct my question, so it would be more understandable.}